B&o Beovision MX2000 Totally Dead - UK Vintage Radio Repair and Restoration Discussion Forum

Ryan_1993 · 20th Jul 2025, 7:34 pm

Back in 2022, after returning from working abroad, I went to power on my B&O Beovision MX2000—but nothing happened.

About five minutes after plugging it in, I heard a faint sizzling noise, followed by a loud bang and some smoke. I had a strong suspicion it was one of the filter capacitors—and it turns out I was right.

Fast forward to summer 2025 and, after a house move, I finally found the time to open up the set and take a proper look inside. Sure enough, there’s a visibly exploded capacitor on the main power supply board.

The issue is that the TV is now completely dead. I’ve been told this particular capacitor shouldn’t completely prevent the TV from powering on, but in my case, it clearly has. No lights or anything and it never comes on.

I’ve tested the three internal glass fuses, as well as the plug fuse, and all of them checked out fine.

Beyond testing fuses, I’m a bit stuck on what else could be causing the problem. Before 2022, the set was working perfectly fine.

its ur aerial · 20th Jul 2025, 7:50 pm

When that cap went S/C it could have blown the print off check underneath for damaged print, have you got any mains supply going to the power supply ? Unfortunately I am not that familiar with the later B&O sets.
But some one on this Forum will be able to offer more advice.
Ken G6HZG.

Ryan_1993 · 20th Jul 2025, 7:56 pm

Quote:

Originally Posted by its ur aerial

When that cap went S/C it could have blown the print off check underneath for damaged print, have you got any mains supply going to the power supply ? Unfortunately I am not that familiar with the later B&O sets.
But some one on this Forum will be able to offer more advice.
Ken G6HZG.

Underside of the PCB looks totally fine

The MX2000 is from around 1986 so its 40 years old now.

Maarten · 20th Jul 2025, 8:32 pm

It sports a Thomson ICC3500 (ICC3 second generation) chassis, though this PCB would have been a B&O product. The TV is mains separated by a large transformer. The primary circuit shouldn't be too complicated. Maybe first measure around the transformer, see if any power is getting to it.

Also, is it really dead and not in standby?

Studio263 · 22nd Jul 2025, 1:38 pm

If there really are no signs of life (no standby LED etc) then the problem is likely to be on the upper of the two microprocessor panels which are arranged vertically below the tube neck. The memory battery leaks and rots the tracks away, the goo can also ruin the small transistors and diodes in this area.

I'd start here first, especially if there is any corrosion. Start with the 5.2V line and the reset generator, this is normally where problems begin. I've never had to scrap an MX2000 (or an M20) for this fault but repairs can be complicated as the tracks are quite thin. The MELF-type resistors on the print side can fail too if their end caps begin to rot away. Moral: Don't store these sets long-term with the memory batter fitted.

Maarten · 22nd Jul 2025, 10:37 pm

Sounds quite plausible, especially since 'no signs of life' was the first symptom after plugging it in, even before the smoke grenade went off.

20th Jul 2025, 7:34 pm	#1
Ryan_1993 Hexode Join Date: Sep 2012 Location: Yorkshire, UK. Posts: 350	B&o Beovision MX2000 Totally Dead Back in 2022, after returning from working abroad, I went to power on my B&O Beovision MX2000—but nothing happened. About five minutes after plugging it in, I heard a faint sizzling noise, followed by a loud bang and some smoke. I had a strong suspicion it was one of the filter capacitors—and it turns out I was right. Fast forward to summer 2025 and, after a house move, I finally found the time to open up the set and take a proper look inside. Sure enough, there’s a visibly exploded capacitor on the main power supply board. The issue is that the TV is now completely dead. I’ve been told this particular capacitor shouldn’t completely prevent the TV from powering on, but in my case, it clearly has. No lights or anything and it never comes on. I’ve tested the three internal glass fuses, as well as the plug fuse, and all of them checked out fine. Beyond testing fuses, I’m a bit stuck on what else could be causing the problem. Before 2022, the set was working perfectly fine. Attached Thumbnails

20th Jul 2025, 7:50 pm	#2
its ur aerial Heptode Join Date: May 2009 Location: Ryde, Isle of Wight, UK. Posts: 606	Re: B&o Beovision MX2000 Totally Dead When that cap went S/C it could have blown the print off check underneath for damaged print, have you got any mains supply going to the power supply ? Unfortunately I am not that familiar with the later B&O sets. But some one on this Forum will be able to offer more advice. Ken G6HZG. __________________ Life is not Hollywood, life is Cricklewood.

20th Jul 2025, 8:32 pm	#4
Maarten Dekatron Join Date: Dec 2007 Location: Haarlem, Netherlands Posts: 4,722	Re: B&o Beovision MX2000 Totally Dead It sports a Thomson ICC3500 (ICC3 second generation) chassis, though this PCB would have been a B&O product. The TV is mains separated by a large transformer. The primary circuit shouldn't be too complicated. Maybe first measure around the transformer, see if any power is getting to it. Also, is it really dead and not in standby?

22nd Jul 2025, 1:38 pm	#5
Studio263 Octode Join Date: Apr 2007 Location: Hampshire, UK. Posts: 1,641	Re: B&o Beovision MX2000 Totally Dead If there really are no signs of life (no standby LED etc) then the problem is likely to be on the upper of the two microprocessor panels which are arranged vertically below the tube neck. The memory battery leaks and rots the tracks away, the goo can also ruin the small transistors and diodes in this area. I'd start here first, especially if there is any corrosion. Start with the 5.2V line and the reset generator, this is normally where problems begin. I've never had to scrap an MX2000 (or an M20) for this fault but repairs can be complicated as the tracks are quite thin. The MELF-type resistors on the print side can fail too if their end caps begin to rot away. Moral: Don't store these sets long-term with the memory batter fitted.

22nd Jul 2025, 10:37 pm	#6
Maarten Dekatron Join Date: Dec 2007 Location: Haarlem, Netherlands Posts: 4,722	Re: B&o Beovision MX2000 Totally Dead Sounds quite plausible, especially since 'no signs of life' was the first symptom after plugging it in, even before the smoke grenade went off.